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if else inside generate statement

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shainky

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hi,
can i use if else inside generate statement?
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generate
      for (i = 0; i < my_size; i = i + 1)
    begin : size
                    u_mux(.in(index[i]),
                  .sel(idx_int[i]),
                  .out(side[4*i +: 4]));
           if (i == 'd0)
           assign my_data[64*i +: 64] = {{56{1'b0}},data[8*i +: 8]}; 
       else if (i == 'd1) 
            assign my_data[64*i +: 64] = (datasize == 1'b1) ? {{48{1'b0}}, data[8*i +: 16]} : 
                        {{56{1'b0}},data[8*i +: 8]}; 
       else  
            assign my_data[64*i +: 64] = {{56{1'b0}},data[((8*i)+8) +: 8]}; 
 
end 
   endgenerate


I think we cannot use assign statement with if statement.
But the moment i am removing assign statement i am getting spyglass lint errors.
Is this code synthesizable?
 
Last edited by a moderator:

A generate if can be used in this place, because the if condition is static, only depending on generate var i.

Regular if statements can be only used inside a sequential block or function.
 

The if is used to select how the least significant 64-bit words are assigned to the my_data bus. As the if is used to conditionally assign 64-bits it is required, otherwise the three assigns would conflict with each other.

It should have no problen synthesizing.
 

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